The traffic engineer suggested improving the congested intersection through channelization of the roads.

channelization 是由名词 channel（通道、渠道）加上后缀 -ize（使...化）变成动词 channelize，再加上名词后缀 -ation 构成的名词。channelize 的意思是"使形成通道"，channelization 指的是"渠化"，即通过设置隔离带、导流岛等方式引导车流有序行驶的交通工程措施。